For all figures, observations are on the top panels (A, B, C) and abundance estimates on the bottom panels (D, E, F). The lines represent the aircraft transects, while the dots show the observations of both individual and groups. Each observation plot shows the number of sightings and the total number of individuals detected. The estimated abundance over the whole area, with the 95% confidence intervals, is also shown for the estimation plots. Left panels present visual monitoring, centre panels low-altitude digital monitoring, and right panels high-altitude digital monitoring.


AO51

Bretagne sud - 23/07/2022


Alcids


Gannets


Larids


Cormorants


Divers


Grebes

Skuas


Shearwaters


Fulmars


Storm petrels


Cetaceans

## Fitting half-normal key function
## Key only model: not constraining for monotonicity.
## AIC= 792.57
## No survey area information supplied, only estimating detection function.


Sharks


Large fish


Sunfish


Jellyfish


AO52

Bretagne sud - 22/09/2022


Alcids


Gannets


Larids


Cormorants


Divers


Grebes

Skuas


Shearwaters


Fulmars


Storm petrels


Cetaceans


Sharks


Large fish


Sunfish

## Fitting half-normal key function
## Key only model: not constraining for monotonicity.
## AIC= 340.497
## No survey area information supplied, only estimating detection function.


Jellyfish


AO53

Bretagne sud - 21/01/2023


Alcids


Gannets


Larids


Cormorants


Divers


Grebes

Skuas


Shearwaters


Fulmars


Storm petrels


Cetaceans


Sharks


Large fish


Sunfish


Jellyfish


AO54

Bretagne sud - 27/03/2023


Alcids


Gannets


Larids


Cormorants


Divers


Grebes

Skuas


Shearwaters


Fulmars


Storm petrels


Cetaceans


Sharks


Large fish


Sunfish


Jellyfish